Ok here we. The battery fits great. You have to just tweek the L shape on the cables just a little to line up with the cable connections on the battery. In the instructions it says you have to straighten them out cause the contacts are more inward on the battery top. But they almost fit stock.
It's the same thickness as stock battery + is narrower + lower.
So I put some battery padding on the positive side of the battery + a thin piece in back(which is the bottom of the battery)of the battery.
Seat fits fine. Turned on ignition press button + it quickly starts!
You don't need a Shorai battery charger to charge it.
I'm using a late model Battery Tender Jr which on be changed between lead acid to lithium positions.
Slightly more expensive than the Shorai. I paid $186 from Amazon shipped.